WO2003091145A1 - Systeme d'entrainement pour escaliers roulants ou tapis roulants - Google Patents

Systeme d'entrainement pour escaliers roulants ou tapis roulants Download PDF

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Publication number
WO2003091145A1
WO2003091145A1 PCT/EP2003/004172 EP0304172W WO03091145A1 WO 2003091145 A1 WO2003091145 A1 WO 2003091145A1 EP 0304172 W EP0304172 W EP 0304172W WO 03091145 A1 WO03091145 A1 WO 03091145A1
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WO
WIPO (PCT)
Prior art keywords
chain
drive
drive system
pallet
deflection
Prior art date
Application number
PCT/EP2003/004172
Other languages
German (de)
English (en)
Inventor
Alexander Pietz
Original Assignee
Kone Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Kone Corporation filed Critical Kone Corporation
Priority to AU2003239812A priority Critical patent/AU2003239812A1/en
Priority to EP03732287A priority patent/EP1497219B1/fr
Publication of WO2003091145A1 publication Critical patent/WO2003091145A1/fr
Priority to US10/971,789 priority patent/US7296671B2/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B23/00—Component parts of escalators or moving walkways
    • B66B23/02—Driving gear
    • B66B23/022—Driving gear with polygon effect reduction means

Definitions

  • the invention relates to a drive system for escalators or moving walks, comprising at least one drive motor, possibly cooperating with a gear, at least one drive chain designed as a link chain, deflection elements for the drive chain and means for minimizing the polygon effect occurring during chain entry and exit.
  • the polygon effect is created by the square shape of the chain on the sprocket. As the angle of rotation increases, the effective radius on the sprocket varies, causing the chain speed to fluctuate between a maximum and a minimum value. When the sprocket is engaged, the chain rollers and the teeth of the sprocket have different speeds, which results in shocks.
  • the circulation effect is a consequence of the angular momentum that is transmitted from the chain wheel to the chain links and thus to the steps or pallets. After the chain has run out of the chain wheel, this angular momentum is initially retained by the inertia of the system, which leads to the so-called rolling of the chain. The angular momentum is reduced by friction in the chain or, in the presence of a chain guide element, by impacts between the chain and the guide.
  • EP 0 71 1 725 discloses a device for guiding a belt continuum for escalators or moving walks, in which the chain grooves are guided with a track by means of a support rail and with a track by means of a compensating rail.
  • the chain rollers come from the rectilinear track of the support rail onto the curved track of the compensation rail and from there at a tangent point into engagement with the chain wheel.
  • the chain rollers are moved in the direction perpendicular to the direction of travel by a distance from the chain wheel measured transversely to the direction of travel, which should have an advantageous effect on the smooth running of the belt continuum.
  • This special curve shape of the connecting part is also intended to reduce the polygon effect.
  • link chains can be used for the step or pallet belt, which also have a larger division depending on the step or pallet width, for example about 200 or about 400 mm.
  • These enlarged chain divisions, which are desirable per se, may, however, cause problems - as far as the polygon effect in the deflection and possibly also the synchronous drive mode of the handrail is concerned.
  • escalators and moving walks that can be used in interior areas, for example of department stores or the like, which are equipped with drive chains, in which, in view of the relatively low forces, the steps or pallets interacting with the steps or pallets.
  • Pallet bolts and rollers are positioned in the respective joint areas of the drive chains.
  • the polygon effect that is still present when the drive chains are deflected is problematic.
  • An escalator can be found in DE-Gbm 1 8 92 806, with chain strands running on continuous, endless chains that are held together by individual chain links, with the interposition of steps suspended on step axes.
  • the plates of individual chain links connecting the chain rollers serve as a connection for the front step axes.
  • the distance between adjacent step axes corresponds to the division of the steps and is a multiple of the division of the chain strand.
  • Three chain links per level are shown.
  • DE-Gbm 74 29 1 1 8 describes an improved chain drive, in particular for escalators, in which each step is articulated with a chain joint with at least one of its ends.
  • the chain has essentially only one of the number of joints corresponding to the number of steps connected.
  • the chain is guided over at least part of its orbit.
  • at least two joints should always be in engagement with each sprocket to avoid polygon effects.
  • the aim of the subject matter of the invention is to provide a novel drive system for an escalator or a moving walkway, particularly usable for so-called department store escalators or moving walks, which nevertheless avoids the resulting increased polygon effects as much as possible with an enlarged chain pitch and, if the drive is shared, also requires synchronous running if necessary associated handrail should be possible.
  • the drive chain has such a pitch that a maximum of two links per step or pallet are used, and that the means is formed by at least one device via which the drive motor or the deflection element or elements does not constant speed can be operated.
  • the means can be formed by a power supply unit, in particular a frequency converter, which acts on the drive motor in such a way that a non-constant speed is generated.
  • Another possibility is to form the means by at least one pair of gearwheels with a variable pitch or pitch circle diameter, via which at least one or the deflection elements of the step or pallet belt can be driven at a constant speed. If necessary, the respective handrail can also be operated at a non-constant speed on the handrail drive wheel.
  • the subject of the invention now shows various possibilities of how the undesirable polygon effect is reduced even when the chain pitch is increased can be.
  • the person skilled in the art will select the suitable means (electrical or mechanical) for the respective application.
  • Today's state-of-the-art chain pitches are around 133 mm for conventional step or pallet tread lengths of around 400 mm.
  • the chain pitch can be increased in two steps. Given the same conditions (step or pallet tread length of about 400 mm), there would be further possible chain divisions, once 200 mm and once 400 mm, i.e. two links per step or pallet or one link per step or pallet.
  • the subject of the invention is applicable to all types of escalators or moving walks, but preferably for the drive chain of an escalator or moving walkway that can be used in the interior of buildings. It is therefore not only the effect of the increased chain pitch but rather the combination of the same with a suitable measure for reduction of the polygon effect, which now leads to an economically interesting solution, especially for drives for department store escalators and escalators.
  • Figure 1 drive chain for an escalator in the entry area of a
  • Figure 2 a drive chain for an escalator with external
  • FIG. 3 schematic diagram according to Figure 2b - 2d in connection with a
  • Means for reducing the polygon effect here a frequency converter
  • FIG. 4 schematic diagram of the system structure according to FIG. 3;
  • FIGS. 5-7 comparative comparison of a conventional type of drive with the subject of the invention according to FIG. 3;
  • Figure 8 schematic diagram of an escalator drive, including a combinable step and handrail drive
  • FIG. 10 schematic diagram of an escalator drive including a combined step and handrail drive that differs from FIG. 8;
  • Figure 1 Alternative mechanically acting means for reducing the polygon effect.
  • Figure 1 shows the drive system 1 according to the invention as a schematic diagram, including a deflection element 2 designed as a chain wheel and a drive chain 3.
  • the drive chain 3 has a plurality of interconnected plates 4 which are connected to one another via joints 5. About halfway between the joints 5 extend rollers 6, which are operatively connected via step bolts 7 to the steps of an escalator, which are not recognizable here.
  • the deflection element 2 has chain teeth 8, which are adapted to the pitch of the drive chain 3 in a correspondingly reduced manner.
  • a step tread length of 400 mm should be assumed.
  • the chain teeth 8 are provided on the chain side with recesses 9 which serve to receive the joints 5, while the rollers 6 are positioned in corresponding recesses 10 of the deflection wheel 2.
  • Figure 2a shows a drive system 1 1, which represents the prior art and is used for an escalator. Steps 1 2 can be seen, which interact via stepped bolts 1 3 with rollers 1 5 provided outside the drive chain 1 4.
  • the stepped bolts 1 3 extend through the joints 1 6 of the drive chain 1 4. Assuming a step length of approximately 400 mm, a chain pitch of 1 33 mm results, so that each step 1 2 is assigned three links of the drive chain 1 4.
  • Figures 2b-d show the drive chain 3 according to the invention.
  • Figure 1 In a departure from the drive chain 1 4 according to FIG. 2a, the rollers 6 are positioned between the joints 5 (FIGS. 2b, 2c) of the drive chain 3 and connected to the respective step 1 2 via the step bolt 1 6.
  • Such drive chains are to be used for so-called heavy-duty escalators.
  • Figure 2d shows a drive chain 3, which is to be used in so-called department store escalators, the rollers 15 being positioned in the region of the joints 5. A larger chain pitch is also provided here.
  • FIG. 2b shows a drive chain 3 with 200 pitch, i.e. Two links of the drive chain 3 are provided for each step, while FIG. 2c shows a drive chain 3 with a 400 pitch and internal rollers 6 which are positioned between the joints 5 of the drive chain 3.
  • the chain pitch of the drive chain 3 in operative connection with the deflecting element 2, which is reduced in terms of the number of teeth, it can now preferably be used for department store escalators.
  • FIG 2d shows a drive chain 3, in which there is also an enlarged chain pitch compared to Figure 2a.
  • the rollers 6 are provided in the area of the joints 5.
  • Such drive chains 3 can be used for so-called department store escalators due to their light construction.
  • the due to the Larger chain pitch increasing polygon effects are reduced by the measures described in the following figures so that with an increased chain pitch there is advantageously a lower purchase price for the drive chain and at the same time the driving comfort is considerably increased by minimizing the polygon effect.
  • FIG. 3 shows a schematic diagram of a passenger conveyor system, only indicated, for example an escalator.
  • the following components can be seen:
  • a deflection wheel 17 which is equipped with a plurality of teeth 18, a link chain 20 consisting of a plurality of links 19 and an electric drive motor 21 which, if necessary, is operatively connected to a transmission (not shown).
  • the connection between the drive motor 21 and the deflection wheel 17 is ensured by the drive member 22.
  • the direction of travel of the chain 20 or the direction of deflection of the deflection wheel 17 is indicated by arrows.
  • the polygon effects that occur when the chain 20 enters the deflection wheel 17 are now reduced in accordance with the invention in that the speed of the drive motor 21 is superimposed on a different speed, so that the deflection wheel 17 rotates at a non-constant speed that corresponds to the mathematical function of the chain 20 Entry into the deflection wheel 17 corresponds as far as possible, as a result of which the impacts occurring in the overall system due to the polygon effect are minimized.
  • a frequency converter 23 is operatively connected to the drive motor 21, which drives the drive motor 21 in such a way that it rotates at a non-constant speed and transmits this non-constant speed via the drive element 22 to the deflection wheel 17 in a superimposed manner becomes.
  • a plurality of control parameters can be stored in a control device 24, the basic pattern of already existing escalators or moving walks include, so that these basic settings can be used in standard versions.
  • the frequency converter 23 can now be supplied with electrical measured values in such a way that the drive motor 21 is continuously controlled, for example at different rotational speeds of the chain 20 can be.
  • the subject of the invention in addition to reducing the polygon effect, also considerably increases the smooth running of the passenger conveyor system without having to make any modifications on the mechanical side in this example.
  • Manufacturing tolerances of the deflection wheel 17 and / or the chain 20 can be stored by interpolation of the control device 24 or the frequency converter 23, the monitoring of the phase angle or of the occurring in the operating state
  • FIG. 4 shows a schematic system representation of how the polygon effect of a chain wheel system on the drive side can be influenced so positively that the smooth running of the escalator or moving walk (not shown) is improved.
  • the elements that are operatively connected to each other are namely the chain, the sprocket (deflection wheel), the transmission, the motor and the frequency converter.
  • the respective speed values are shown over time in the interfaces between chain and sprocket, sprocket and gear, gear and motor as well as motor and converter.
  • a position sensor is assigned to the chain wheel, which determines the position of the respective receiving spherical cap, formed between two chain teeth of the chain wheel, and thus determines the phase position.
  • the value of the respective phase position of the chain wheel is fed to a downstream control unit that is in operative connection with a function generator.
  • the function generator contains the mathematical function (s) of the chain when it enters the chain wheel (speed setpoint), so that in the range of Control unit only a comparison of the transmitted specific phase position of the sprocket with the predetermined speed setpoint must take place.
  • the correct value is then fed to the converter as a synchronized speed setpoint, so that a corresponding speed value can then be superimposed on the chain wheel via the motor and gear.
  • position-dependent control of the speed thus takes place, as a result of which the smoothness of the passenger conveyor system can be increased considerably.
  • FIGS. 5 to 7 show comparative examples on the one hand of a conventional drive (FIG. 5) with the desired state with the correct phase position (FIG. 6) and of the need for synchronization (FIG. 7).
  • FIG. 6 shows one possibility of realizing the invention, namely that the speed of the chain is made constant, while the rotational frequency of the chain wheel represents a curve-like function, as seen over time.
  • the speed of the chain is made constant
  • the rotational frequency of the chain wheel represents a curve-like function, as seen over time.
  • other possibilities are also conceivable.
  • phase shift to be synchronized being stored as a mathematical function in the function generator and made available to the control unit.
  • the control unit then only determines the deviation of the phase position of the sprocket provided by the position sensor, in comparison to the speed setpoint, the phase shift to be synchronized then being made available to the converter as a synchronized speed setpoint and thus to the sprocket via motor and transmission.
  • Figure 8 shows a transfer case 27 for an escalator, not shown.
  • a drive 28 which is only indicated and consists of a motor and, if necessary, a reduction gear.
  • Gears 29, 30, 31, 32 are provided within the transfer case 27, the gear wheels 30 and 31 being on the one hand on a step sprocket shaft 33 and on the other hand on a handrail drive shaft 34 act.
  • the step chain wheel-side gear pair 29,30 is provided with a variable pitch circle diameter 35,36, the variable The pitch circle diameter 35, 36 fluctuates between a minimum and a maximum value on the circumference, in such a way that the chain wheel (not shown further) has teeth.
  • the gear pair 29, 30 then generates a defined non-uniformity only on the side of the step sprocket shaft 33, while the speed of the handrail drive shaft 34 remains constant in this example.
  • This drive concept is preferably used when an increased chain pitch (depending on the step width) of 200 or 400 mm, for example, is required. uniform drive speed of the drive motor 28 requires a different kind of compensation of the polygon effect, in order to bring about a synchronism between the stepped or sprocket shaft 33 and handrail drive shaft 34.
  • the schematic diagram according to FIG. 9 shows a transmission 27 'in operative connection with a drive motor 28' for use in a moving walkway, not shown.
  • Gearwheels 29 ', 30' are arranged within the transmission 27 ', the gearwheel 30' forming the output in the direction of a pallet sprocket shaft 33 '.
  • the pair of gearwheels 29 ', 30' on the pallet sprocket side is provided with a variable pitch circle diameter 35 ', 36' in this example.
  • Figure 10 shows a schematic diagram of an alternative to Figure 8 escalator drive, including a transfer case 27 "in operative connection with a drive motor 28".
  • the gear 27 has gear wheels 29", 30 ", 31".
  • the gear 30 forms the drive of the step sprocket shaft 33".
  • the handrail drive shaft 34 is now also driven with a non-uniform movement via the toothed wheel 31".
  • the vibrations introduced in the area of the handrail (not shown) are so small that they are not perceived as unpleasant for the user of the escalator.
  • the pitch circle diameters 35 ", 36" are indicated.
  • Figure 1 1 shows another mechanically acting means for minimizing the polygon effect in drive chains with increased chain pitch. Only the basic structure is shown.
  • a drive chain 37, a deflection element 38 and a guide track 39 upstream of the deflection element 38 for the targeted deflection of the rollers 40 of the drive chain 37 can be seen.
  • a deflection of the rollers 40 downward is indicated, an upward deflection also being conceivable.
  • the guideway 39 interacts with a curve element 41 of a predeterminable contour, the shape of which the person skilled in the art will adapt to the respective application.
  • the drive chain 37 is shortened in this area by deflecting the roller 40, in this example only that which then engages in the deflection element 38.
  • the speed of the chain strand is influenced due to changes in angle and radius. There are deviations from the desired constant speed.
  • the drive chain 37 is guided before the entry into the deflection element 38 via a guide track 39 which has a rather continuous curve shape.
  • the subject of the invention takes advantage of the fact that the position (s) of the upstream roller (s) 40 are influenced, depending on the phase position of the deflection element 38.
  • the position of the curve element 41 in front of the curve element at least one of the rollers 40 should be influenced in such a way that there is a change in speed (positive or negative), the total of which Speed fluctuations when engaging the deflection element 38, respectively the guide groove 42 and thus the polygon effect is reduced.

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  • Escalators And Moving Walkways (AREA)

Abstract

La présente invention concerne un système d'entraînement destiné à des escaliers roulants et à des tapis roulants, comprenant au moins un moteur d'entraînement qui interagit éventuellement avec une transmission, au moins une chaîne d'entraînement qui se présente sous la forme d'une chaîne à maillons, des éléments de renvoi destinés à la chaîne à maillons, et un mécanisme qui sert à minimiser l'effet polygone qui survient au cours du démarrage et de la rotation de la chaîne. Selon l'invention, la chaîne d'entraînement présente une séparation telle qu'au maximum deux maillons sont disponibles par marche ou par plaque, et que le mécanisme est formé par au moins un dispositif grâce auquel le moteur d'entraînement ou l'élément/les éléments de renvoi ou la chaîne d'entraînement peut ou peuvent être actionné(s) avec un nombre de tours constant ou une vitesse constante.
PCT/EP2003/004172 2000-12-21 2003-04-22 Systeme d'entrainement pour escaliers roulants ou tapis roulants WO2003091145A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2003239812A AU2003239812A1 (en) 2002-04-25 2003-04-22 Drive system for escalators or passenger conveyors
EP03732287A EP1497219B1 (fr) 2002-04-25 2003-04-22 Systeme d'entrainement pour escaliers roulants ou tapis roulants
US10/971,789 US7296671B2 (en) 2000-12-21 2004-10-25 Drive system for escalators or moving walkways

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002118372 DE10218372A1 (de) 2002-04-25 2002-04-25 Antriebssystem für Rolltreppen oder Rollsteige
DE10218372.4 2002-04-25

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US10/728,852 Continuation-In-Part US6874613B2 (en) 2000-12-21 2003-12-08 Drive device for escalators or moving walkways

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/971,789 Continuation US7296671B2 (en) 2000-12-21 2004-10-25 Drive system for escalators or moving walkways

Publications (1)

Publication Number Publication Date
WO2003091145A1 true WO2003091145A1 (fr) 2003-11-06

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ID=29224740

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/004172 WO2003091145A1 (fr) 2000-12-21 2003-04-22 Systeme d'entrainement pour escaliers roulants ou tapis roulants

Country Status (4)

Country Link
EP (1) EP1497219B1 (fr)
AU (1) AU2003239812A1 (fr)
DE (1) DE10218372A1 (fr)
WO (1) WO2003091145A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876135A1 (fr) * 2006-07-04 2008-01-09 Inventio Ag Système d'actionnement pour acheminement de passagers

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2243430A (en) 1990-04-18 1991-10-30 Hitachi Ltd Power transmission apparatus, sprocket means used therein, and passenger conveyer using the same
US5697486A (en) * 1994-11-14 1997-12-16 Investio Ag Device for the guidance of an endless belt for escalators or moving walkways
US6016902A (en) * 1996-10-22 2000-01-25 Lg Industrial Systems Co., Ltd. Upper rail for passenger conveyor
US6351096B1 (en) 1999-04-30 2002-02-26 Otis Elevator Company Operation control apparatus for escalator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19708709C1 (de) * 1997-02-24 1998-03-12 Mannesmann Ag Antrieb für eine kontinuierliche Ziehvorrichtung zum Geradeausziehen von Rohren oder Stangen
DE19926742A1 (de) * 1998-07-08 2000-01-13 Siemens Ag Hochmagnetfeldgerät
DE10120767C2 (de) * 1999-12-06 2003-03-13 Kone Corp Verfahren und Einrichtung zur Reduzierung des Polygoneffektes im Umlenkbereich von Personenförderanlagen
DE19958709C2 (de) * 1999-12-06 2001-10-25 Kone Corp Verfahren und Einrichtung zur Reduzierung des Polygoneffektes im Umlenkbereich von Personenförderanlagen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2243430A (en) 1990-04-18 1991-10-30 Hitachi Ltd Power transmission apparatus, sprocket means used therein, and passenger conveyer using the same
US5697486A (en) * 1994-11-14 1997-12-16 Investio Ag Device for the guidance of an endless belt for escalators or moving walkways
US6016902A (en) * 1996-10-22 2000-01-25 Lg Industrial Systems Co., Ltd. Upper rail for passenger conveyor
US6351096B1 (en) 1999-04-30 2002-02-26 Otis Elevator Company Operation control apparatus for escalator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876135A1 (fr) * 2006-07-04 2008-01-09 Inventio Ag Système d'actionnement pour acheminement de passagers
US7918326B2 (en) 2006-07-04 2011-04-05 Inventio Ag Driving system for passenger transportation

Also Published As

Publication number Publication date
DE10218372A1 (de) 2003-11-13
EP1497219A1 (fr) 2005-01-19
AU2003239812A1 (en) 2003-11-10
EP1497219B1 (fr) 2012-06-06

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